Radiant heating means



June 1s, 1940. W, wjTlMMls HAL y 2,205,001

RADIANT HEATING MEANS WILLIAM WALTERTIMMIS MAURICE A. MICHAELS June 18, 1940.

W. W. TIMMIS ET AL RADIANT HEATING MEANS Filed D ec. 16, 1957 4 Sheets-Sheet 2 MAuRlcE A. MICHAELS June 18, 1940. w. w. TIMMls ET Al. RADIANT HEATING MEANS 4 Sheets-Sheet 3 Filed Dec. 1s, v1937' Y Mm @WE Y O H W- mwm R E UM m VA l T WWA F.. mm IR MU WM A ZOb June 18, 1940. w. w. nMMls Er AL,

RADIANT HEATING MEANS Fil'ed Dec. 16, 1957 4 Sheets-Sheet 4 INVENTORS WILLIAM WALTERTIMMIS MAURICE A. MICHAELS com ..N INN Sw .....HHH..........H2L I I LA. THIR. Y

Patented June1s,194o I y 'Y 2,205,001

UNITED STATES PATENT 'OFFICE ,vaannmr argc MEANS t A William Walter Timmie, Glen Cove, and Maurice A. Michaels, Bronx, N. assignors, by mesne assignments, to American Radiator & Standard Sanitary Corporation, New York, N. Y., a

' Application December 16, 1937, serial No. 180,124

9 claims. (ci. 237-1) This invention relates to heating means for the tion arranged in assembly as a comercial unit. rooms of building structures and the like, and it The view discloses the interior of the unit. relates more particularly to that type of heating Fig. 9 is a central vertical section of another means which when installed forms-a part of the embodiment of the invention applied to effect Il wall structure of a room and which functions to radiant heating from opposite faces of a. wall,

heat the room space by radiation of heat energy partition or the like. from the surface of such part of the'wall` struc- Fig. 10 is a detail view of the radiators of Fig. 6 ture which is exposed to the room, as connected in series. The radiators are illus- One of the objects of the invention is to provide trated in front elevation with a portion of their l0 heating means of the above'character which is of front walls broken away to reveal a by-paSS ar- 10 improved construction and arrangement of parts rangement. and which performs its function of heating a Fig. 11 represents a horizontal section taken A room in ahighly eiiicient manner. onthe line II-I I, Fig. 10.

According to one of the preferred embodiments Fig. 12 represents a fragmentary lvertical sec- 15 of our invention, we provide an upright hollow tion taken on the line I2I2, Fig. 11. 15

side wall structure foraroom, containing therein Referring to Figs. 1, 2, 3, 4 and 5, the wall a fluid medium, such as air, which is capable of indicated generally by I0 may represent an outer absorbing and giving up heat energy by convecwall of a building, a room or other enclosure intion. The side wall structure is preferably air dicated at II. The floor line of such room is tight and is divided interiorly into up-going and indicated at I2 and its. ceiling line isY indicated 20 down-coming passages which communicate at at I3. The outer facing materials of such outer their upper and lower ends, respectively, to prowall I0 may be as desired. As indicated in Fig. 2 vide a closed continuous flowA path for the fluid such ou'ter facing materials represent clap boards medium, which path extends in directions sub- I0a and 'sheathing boards I0b, the latter being stantlally parallel to the plane of the side wall applied directly to studding Ill-I. The inner 25 structure. We provide within the lower part of facing material, indicated at I 4, of such outer the up-going passage, a heat-emitting device wall I0, may be as desired; as indicated in Fig. 2, which is contacted by the fluid medium. vThus, such inner facing material I 4 is plaster which is the fluid medium circulates by gravity along the suitably held in position, as by expanded metal closed path and in so doing absorbs heat energy lathing indicated at Mb, or the like. 30 from the heat-emitting deviceand gives up such Also, desirably, and in cooperative relation with heat to the side wall structure from where it is the instrumentalities attaining the purposes of radiated into the interior of the room spaces. this invention, materi effecting reection of Further features and objects of the invention radiant heat energy, such as aluminum foil will be more fully understood from the following mounted on paper or the like, indicated at I6, is 8 6 detail description land accompanying drawings, preferably'vv applied to the inner surface of the in Whichstudding I0-I to form a septum interposed be- Fls. 1 is an elevation, partly broken through. tween the sheathing lob and the inner f ying of a panel embodying a pi'eferred form 0f the in material I 4 to dene an air-flow-activating 40 vention, the applied arrows indicating paths of chamber Within the Wan. The foi] serves to re 40 au' .ow 1 ti t k l. 2 2 iiectthe heat away from the outer wall structure,

2 1S a vertlca Sec on a' en on me of and toward the inner wall structure or panel I4. g' Desirably, to minimize heat losses, suitable in- Fi 3'is an elevation of a referred form of air gow activatmg device' viewd from the man sulatmg material such as rock wool, as indlcated 5 Fig 4 is a horizontal sectional View on une 4 4 at I 5,'is interposed between the outer facing ma- Of 191g- 1 on a somewllat Scale. l Serials Iqa, Aand the septum I6. Y

Fig. 5 is a vertical sectional View on line .5 5 The alf-HOW-actilatng Chamber iS indicated of Fig. 3. at I'I, and, as appears more fully hereinafter, is

Fig. 6 is an elevation, partly broken through, suitably rendered substantially air-tight througho similar to Fig. 1, but illustrating another embodiout.

ment of the invention. Suitably disposed with relation to the en- Fig. 7 is a detail view illustrating the radiators trapped air of such substantially air-tight chamof Fig. 6 in rear elevation. ber I1, is a heat emitting, i. er air-flow-activat- 5I Fig. 8 represents an embodiment of the invenying, device indicated at I8, which may be suit- Il ably arranged, usually by provision of a hollow interior and suitable means communicating with such hollow interior, for the inflow and circulation therethrough of a thermal fluid such as heated water, steam, or the like and preferably having extended surfaces such as h eat exchange fins, indicated at lspsuitably projecting within such air-flow-activating space- I1.

If desired, and as is illustrated, such air-howactivating device I8 may have a face portion serving per se as heat radiant means, which face portionindicated at Illa, may be disposed in suitable alignment with the exposed face I4a of the innerl wall material I whereby heat energy directly radiated by its exposed face Ila coacts with the radiant heat energy emanating from the exposed face I4b' of the inner wall material I4 to effect comfort heating.- As appears more fully hereinafter, such radiant face Ia of the air-flow activating device I8 has a temperature higher than the average range of ternperature of the radiant face portion I4a of the Wall I0. i

Such radiator orother flow-activating device, see particularly Figs. 3 and 5, is' heated by any suitable thermal fluid, 'such as heated water, steam or the like. At 20a. is indicated piping serving for the supply of such thermal fluid, any suitable valve indicated at 2I serving to control and regulate the inilow, of such thermal uid into and through the radiator I8. At 20h is indicated the piping for the outflow of the thermal iluid. The body and/or the ns of such flowactivating device I8 is of suitable material such, for example, as cast iron for eiliciently heating and thereby activating the flow of air by thermal exchange contact therewith.

The heatexchange fins I9 of such radiator, or other flow activating device, are preferably contoured and arranged in coordination with the character of the desired path of flow of the heated air or other activated medium. In the arrangement illustrated in Figs. 1 through 5, the ns I9 are of two sets for coordination with ilowcontrol means composed of vtwo sets of strips providing for centralfupward flow of the heated air over a path substantially within the margins strip sets 22, 22a,

the radiator, that is to say, the body of the of the lateral sides of upward flow directly above radiator, and two paths of downward flow under temperatures of the flow-activated air toward and in return heat exchange flow relation with such two sets of fins, such cycle of positive ilow of the flow-activated medium exchange contact with the radiator.

One form of such flow-directing means, and in particular for coordination with a radiator having two sets of heat exchange fins, is illustrated in Figs. 1 through 5, and may comprise and 23, 23a, extending vertically substantially at the margins of the respective lateral sides IBb, Ic of the radiator I8. The individual vertically related strips of each set, say the set 22, 22a are mutually vertically spaced with respect to one another, that is to say, the upper strip 22a, see Fig. 1, is spaced at its lower terminus 22A, from and above the upper terminus of the lower strip 22 by a clearance 24, which clearance 24, as appears more fully hereinafter, serves as a by-pass or an interlinking path of flow for the air or other activated medium. Also, the upper terminus 22B of such upper strip 22a is spaced by a clearance 25 from and between the upper marginal material 26 of the air-flowbeing repeated in recurrent heat activating chamber I1. The' strips 23, 2Ia, of. the coordinated set, cooperating with the stated set 22, 22a of the flow-directing means, are similarly related, and like clearances 24, 25, are provided for. Should a larger number of strips for each set of flow-directing means' be desired, the same principle of clearances at vertical levels between the respective vertically successive strips and between the upper terminal of the uppermost strip andthe upper marginal material of the air-ow-activating chamber, applies.

The upper wall of the flow-activating-chamber I1 is indicated at 26, being, advantageously, a portion of the ceiling structure of the room II.

The lateral walls of the air-flow-actlvating 1 through 5, are indicated at 21, 28. The lower wall of the chamber I1, of the structure illustrated in Figs. l through 5, is indicated at 29, being, advantageously, a portion of the floor structure of the room II.

In coordination with such flow directing meansfsnch two sets of nns I9 on the element Il may be of arcuate configuration to deilne mutually therebetween passages I9a, which passages extend upwardly and preferably also in direction toward the central axis of the radiator to thereby increase the time period of heat exchange contact. The fins of any one set may be uniformly spaced from one another, to thereby provide for air ow passages of uniform width. Each iin may not necessarily be continuous over Lthe face of the radiator, for example, we provide iins I9b which begin and end intermediate the locations offbeginning and ending of the major number of fins, which are designated I9, a purpose of such fins I9b being to distribute more unlforrnly the air discharged through the clearance between the two sets of ns. While an arcuate formation is desirable for enhancing the flow of the air or other activated medium, it is understood that the formation of each fin and the special relationship of consecutive fins of each set may be other than of arcuate configuration, that is to say, of general character providing for an outflow of the heated air or other activated medium at a level higher than the inow.

Accordingly, pursuant to the type of embodimentv of the invention illustrated .in Figs. l through 5, upon supply of the thermal uid to such radiator I8, thereby elevating the temperature of the body of the radiator and therewith the two ysets of iins I9, the air heated by such radiator and ns is activated in its flow through the passages I9a, or equivalent, defined by contiguous individual fins, the direction of flow through such passages being indicated by the applied arrowed lines, see Figs. 1 and 3, the thus flow-activated air entering the central channel, indicated as 30 in Fig. l, the path of the lowermost portion of such air being indicated by the group of arrowed lines designated 30a.- Upon such flow-activated air attaining the vertical level of the respective clearances 24, 24, a portion of such flow-activated air is diverted, as indicated by the arrowed lines 30h, to and through such clearances 24, 24, respectively, the remainder of such flow-activated air passing more upwardly through the channel 30, such more upwardly rising air being indicated by the arrowed lines designated 30o. The cooler and consequently heavier air in the upper portion of the enclosure and in the return passages 3l descends and displaces the warmer and consequently lighter air immediately adjacent and above the heat-emitting chamber I1, of the structure illustrated in Figs.

element I8, thereby causing upward movement of the warmer air over the rear face of the panel or wall I4. The cooler air which descends in the channels 3| contacts the heat-emitting element I8 and being heated thereby rises as heated y air in the channel 3|! and contacts the rear face of the element I4. This cycle continues until the temperature of the wall or panel I4 reaches an average temperature resulting in the heating effect desired. Such upward flow in the central channel 30 continues until such heated air attains the vertical level of the higher clearances 25, 25. In the instance illustrated, the upper marginal material 26 limits the upwardmost flow movement of such activated air, effecting ow of the air through such clearances 25, 25.

At the initial stage of supply of heated fluid to the radiator, the heating of the portion of the air in Asurface contact with the element I8,Vand consequent upward iiow by convection of `said air portions into the central channel 30, is induced by downward ow of relatively cooler portions of air in the respective lateral channels 3|, 3|, indicated by arrowed lines. Such upwardly owing stream of heated air in the central channel 30, owing to the initial relative low temperature of the material of the exposed face I 4a of the inner wall portion, is rapidly cooled, with the result that, as it approaches the upper portion of the enclosure, a major portion of the heated air voi' higher temperature rising in the central channel 30 is directly returned through the iirst level clearances or by-passes 24, 24, and, beingI bypassed or diverted downwardly into the cooler air in the channels 3|, serves to induce and accelerate downward iiow of the cooler air in said channels. The by-pass or diverter for the warmer air from the channel 30 is so located that the heated air which passes through it from 'channel 36 to 3| into the path of cooler air in the channelsI 3| tends to displace the cooler air from the bottoms oi the channels 3| before the heated portion of the air has lost so much of its molecular activity that its specic gravity approaches that of the cooler air. However, upon recurrent air flow activated by continued heat exchange eiected by the element I8 and consequent increase or rise of temperature of the lower portions oi the material of the exposed face |4a and the also consequent rise of temperature of more upwardly disposed portions of the material of the exposed face |4a, the travel of the activated air in the central'channel 30 increases more and more upwardly and to greater and greater proportion, until ultimately the whole of the material of the exposed face |4a is raised to the desired elevated temperature to effect the sought-for radiant distribution of. heat energy into the room or other enclosure served by the installation. f

In the installation illustrated in Figs. 1 through 5, see in particular Figs. l and 2, the air-ow-activating chamber I1 is defined by material serving per se as parts of the indicated wall I0. Such embodiment of the invention, also, extends from the iloor level (viz. from the material 29 of the floor) to the ceiling level (viz. the material 26 of the ceiling) of the room or other enclosure served by the embodiment.

To enhance the air flow through the one or more vertically successive sets of cl'arancfln diverting iiow through such interlinking passages, there may be provided as is indicated in Fig. 1 with respect to the clearances 24, 24, iow diverting means preferably in the form of arcuate or other suitably arranged strips 32.V Each such dow-diverting element 32 may be positioned and/or secured at the lower terminus of its associated, therefrom upwardly extending, strip as is indicated in Fig. l with respect to the right hand dow-diverting strip 32, positioned at the lower terminus 22A of the strip 22a. These strips or diverters 32, are so curved and located that a portion of the air from the central .stream is caused to ow downward in the channels 3| and by so doing act to accelerate iiow of air from the upper portion of the enclosure down through the channels 3| and into recurrent heat transfer relation to the heat emitting element I3.

As is illustrated in Figs. 2 and 4 in particular, each vertically extending strip, viz. strips 22, 22a, 23, 23a, etc., and each flow-diverting strip 32, extends imperforately horizontally from the rearward wall of the air-ilow-activating chamber Il to the forward wall of the chamber I'I, viz. in the latter instance, to the inner face of the material i4 constituting the inner facial material of the wall I6, so that the streams of air iiow are separated from each other and caused to take deiinite paths.

Such arrangement of Ithe invention may be embodied in similar manner for any desired additional panels or other portion or portions of any Wall of a room or other enclosure. Also, the remaining walls, in whole or in part, of such room or other enclosure may be similarly equipped with the improved radiant heating means.

'I'he arrangement illustrated in Figs. 6 and 7, taken in connection with Figs. l0, 1l and l2, is largely similar to that shown in Figs. 1 through 5, and described hereinabove; like parts are indicated by like reference characters. A distinguishing structural feature embodied in the arrangement illustrated in Fig. 6, is the employment of two radiators or equivalent, IBA, I8B, and therewith coordinated two upward channels 30, arranged laterally of a single central downflow channel 3|. Such cooperating radiators |8A,

I8B may be positioned side by side, the iins |9d of one radiator, say |8A, see Fig. 7, being constructed to intake relatively cooler air (from such central downow channel 3|) at its side toward the other radiator and discharge the thereby heated air into one uplow channel 30, the other radiator, i. e., the radiator I8B having its ns |9e constructed to intake relatively cooler air (from such central downflow channel 3|) at its side toward the radiator IBA and discharge the thereby heated air into the other upiow channel 30, the respective paths of such air iiow, including the air diverted through the interlinking by-pass passages 24, 24, being indicated by arrowed lines.

As above indicated, the hollow body-like structures comprised in the above described embodiments of the invention include material additionally serving as parts of the wall structure per se.

The radiators IBA and I8B are, in the illustrated embodiment, see particularly Figs. l0, l1, and 12, adapted for hot water heating. They are connected in series, the two forming the owactivating means for any single radiant heating arrangement pursuant to Fig. 6. Additional sets of two radiators I8 may be connected in series with the set illustrated should it be desirable to provide additional radiant heating arrangements at other locations around the walls of the room II.

Accordingly, diverter or by-pass channels 20-I are provided preferably internally of the radiators. The by-pass channels connect at their respective inflow ends with the hot water supply piping 20a and at their outflow ends with the discharge piping 2Gb.

For controlling the supply of hot water to the various radiators, and particularly for controlling the supply of hot water to any given radiator or radiators of the system to the exclusion of the others, valve means are provided at the inflow hot water through the radiator, discharge therefrom into the outflow piping outflow openings i8-2.

Should it be desired to employ steam as the heating medium for the radiator, the openings I8--2 may be provided with suitable check valves to prevent back flow of steam into the radiator when the inflow opening thereto is closed.

In another exemplification of the invention, it is desirable to fabricatethe heating means of the invention in the form of a unit,`cornplete in itself. Such unit advantageously provides a chamber entirely enclosed in an air tight manner, and has at least one of its major faces radiant panel for exposure in the room to be heated. The entire unit may be incorporated in a wall of the room with its heat radiant panel forming a portion of the exposed face of the wall. Such unit embodiments of the invention are advantageous, in that the assembled unit is constituted of elements properly arranged and coordinated with one another to insure satisfactory performance when installed. Fig. 8 illustrates one type of such assembled unit, and corresponds in arrangement of individual parts generally to that illustrated in Figs. 1 through 5, like parts being designated by like reference characters. As is apparent from Fig. 8, the rear wall material I6a serves as a direct support of the marginal members 2B, 21, 28, 29 respectively serving to enclose the space corresponding to the air-fiowactivating chamber I1 of the embodiments shown in Figs. 1 through 6, through which chamber the flow-activated air is recurrently circulated in heat exchange facial contact with a suitable radi'- ator I8, or equivalent. Irl such assembled unit, such rear wall material IB serves also to support the strips or equivalent of the respective sets serving to direct the flow of the activated medium.

If desired, the face of the rear wall material I6a, which is exposed within such assembled unit, may be lined or otherwise treated to reflect radiant energy toward the panel which is exposed toward a room space.

In the installation, such unit may be incorporated in a wall. A suitable frontal panel, designated Il inl correspondence with the somewhat similar structural portions of the embodiments of Figs. 1 and 2, possessing the qualities of radiating heat energy when raised to proper range of elevated temperature, serves to complete enclosure of the space defined by the marginal members 26, 21, 28, 29. Such panel engages with free edges of the flow-diverting means, thus completing the formation of confining flow passages for the air or other flow-activated medium. The frontal panel, when the unit is incorporated in a h is had through `wall, advantageously vserves as a'portion of the exposed faceeof the wall, that is to say, the face of the wall which is exposed to the room or other enclosure served by the installation.

Fig. 9 illustrates an embodiment of the invenformed by a heat tion applicablev to a wall, partition or the like, the respective opposed faces Ha, Ma, of which are exposed in adjacent rooms and/or other enclosures of the building or other structure. In

such arrangement, if desired, the radiator I8 or equivalent may be provided with the desired sets of fins or other extended surface I9, I9. projecting from opposite faces of the body of the radiator or equivalent, thereby providing dually related heat exchange elements serving to activate circulatory flow of the full quantum of air within the space between the opposite exposed faces, Ma

I4a, of such wall structure.

Fig. 9 illustrates also the assembly of a radiator which is bodily, as well as its fin structure, wholly enclosed within the air-floweactivating chamber in which the air or other flow-activated medium is entrapped. Such arrangement, as is illustrated in Fig. 9, is typical of the types of structures wherein it is not desired to expose any face or other portion of the radiator or equivalent to the air interiorly of the room or other enclosure. In such ty'pe of embodiment, the lowermost portion of the wall material I4 may be faced. as indicated in Fig. 9 with a base board indicated at 33 or otherwise.

yAs appears from' the above, embodiments of the invention afford elevation of temperature of one or more walls of -the room served by such embodiments, throughout the exposed face of such panel or panels andover a range of distributed facial temperature, yielding comfort heating to occupants of such room, notwithstanding that the temperature of the air of the room be reduced definitely below the present day accepted range of comfort temperature had by conventional heating means. The invention, therefore, enables fresh air to be introduced into such room in enlarged proportions, with attendant lowered temperature of the room air with consequent improved health advantages, such introduced fresh air and/or the intermixed fresh air and room air being preferably conditioned with respect to moisture content and other comfort affecting factors.

Whereas this invention has been illustrated and described with respect to specific embodiments thereof, it is to be clearly understood that many changes may be made without departing from the generic aspects of the invention as indicated herein and as set forth in the claims that follow.

We claim:

1. Heating means comprising a substantially air tight hollow enclosure having a facial wall adapted 'to form a wall surface of a room, said facial wall being of a material capable of radiating heat energy, a ow activating device including a heat emitting element in said enclosure and located at the base thereof and acting when emitting heat to create an upwardly flowing stream of heated air in contact with the inner face of said facial wall, and means in the enclosure whereby said stream acts to accelerate a downward fiow of air from the upper portions of said enclosure and into recurrent heat transfer relation to said heat emitting element.

2. Heating means comprising a substantially air tight hollow enclosure having a facial wall adapted to form a wall surface of a room, said facial wall being of a material capable of radiating heat energy, a fiow activating device including a heat emitting element in saidenclosure and located at the base thereof and acting when emitting heat to create an upwardly owing stream of heated air in contact with the inner face of said facial wall, partition means in said enclosure for directing said stream of heated air toward the upper portion of said enclosure, a return passage from said upper portion for downward passage of air, and means in said partition for by-passing a downwardly directed stream of air from said upwardly flowing stream of'heated air into said return passage to thereby accelerate iiow of air from such upper. portion of said enclosure and down through said return passage into recurrent heat transfer relation to said heat emitting elements.

3. Heating means comprising a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiating heat energy outwardly from the hollow of said structure, said structure extending substantially solely in a substantially vertical plane, being substantially air tight, and containing a uid medium, a heat emitting device disposed within said structure and having heat exchange faces which constitute flow-directing means, said heat exchange faces being arranged to activate flowv of said fluid medium within the hollow of said structure `in recurrent heat exchange relation with said heat emitting device. e

l 4. Heating means comprising a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiat- ,ing heat energy outwardly from the hollow of said structure, said structure extending substantially -solely in a substantially vertical plane, being substantially air tight, and containing a uid medium, a heat emitting device disposed within said structure and having heat exchange faces which constitute ow directing means, said heat exchange faces being arranged to activate flow of said fluid medium within the hollow of said structure in recurrent heat exchange relation -with said heat emitting device, said heat exchange faces being formed by a plurality of elements mutually spaced from one another to define pathsof flow in substantial continuity with the paths of flowfollowed by said fluid medium as it circulates within the hollow of said structure.

5. .Heating means comprisng a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiating heat energy outwardly from the hollow of said structure, said structure extending substantially solely in a substantially vertical plane, being subtantially air tight, and containing a fluid medium, a heat emitting device disposed within said structure and having heat exchange faces which constitute flow-directing means, said heat exchange faces being arranged to activate flow of said fluid medium within the hollow of said structure in recurrent heat exchange relation with said heat emitting device, said heat emitting device including exposed substantially planar heat exchange facial means disposed in substantially vertical alignment with said panel wall means of said structure.

6. Heating means comprising a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiating heat energy outwardly from the hollow of said structure, said structure extending substantially solely in a substantially vertical plane, be-

ing 'substantially air tight, and containing a fluid medium, a heat emitting device disposed zwithin said structure and having heat exchange faces which constitute flow-directing means, said heat exchange faces being arranged 'to activate flow of said fluid medium within the hollow of said structure in Irecurrent vlieat exchange relation with said heat emitting device, mutually spaced 4upwardly extending strip elements disposed with- 1n the hollow of said structure serving to direct flow of said fluid medium substantially throughout the hollow of said structure, said heat exchange faces providing paths of flow in substantial continuity to the paths of iiow followed by said fluid medium as it circulates within the hollow of said structure.

7. Heating means comprising a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiating heat energy outwardly from the hollow of said structure, said structure extending substantially solely in a substantially vertical plane being substantially air tight, and containing a fluid medium, a heat emitting device disposed Within said structurev and having heat exchange faces which constitute flow-directing means, said heatexchange faces being arranged to activate flow of said fluid medium within the hollow of said structure in recurrent heat exchange relation with said heat emitting device, mutually spaced upwardly extending elements disposed within the hollow Avof said structure providing a plurality of circulatory paths of flow for said fluid medium substantially throughout the hollow of said structure, said heat emitting device including exposed substantially planar heat exchange facial means disposed in substantially Y said structure.

8. Heating means comprising a relatively thin box-like hollow structure including exposed panel wall means of suitable material capable of radiating heat energy outwardly from the hollow of said structure, said structure extending substantially solely in a substantially vertical plane; being substantially air tight, and containing a fluid medium, a heat emitting device disposed within said structure and having heat exchange faces which constitute How-directing means, said heat exchange faces being arranged to activate flow of said fluid medium within the hollow of said structure in recurrent heat exchange relation with said heat emitting device, a plurality of mutually spaced sets of vertically spaced and aligned upwardly extending substantially rectilinear strip elements disposed within the hollow of said structure serving to direct flow of said fluid medium ture, and flow deflecting means associated with elements at thenlocation of vertical spacing thereof, said flow defiecting means being so constructed and arranged as to direct flow of a portion of upwardly iiowing heated fluid medium into the path of downwardly flowing fluid medium.

9. Heating means for room spaces comprising a hollow panel wall structure adapted to form at least a substantial portion of an upright side wall of a room and including a side wall part facing the room and capable of radiating heat energy outwardly from the hollow of said structure and into the room, said structure being substantially air tight and containing a fluid medium capable of absorbing and giving up heat energy by convection, an upright partition wall dividing the hollow interior of said structure into juxtaposed up-going and down-coming passages of substansubstantially throughout the hollow of said structisy part, said partition wall being so constructed as position to be contacted with said fluid medium therein, whereby a continuous gravity flow of the fluid medium along said path is assured and the heat energy absorbed by said uid medium from said device is given up to said side wall part.

WILLIAM WALTER TIMIMIS. MAURICE A. MICHAELB. Y 

